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Regenerable and stable sp2 carbon-conjugated covalent organic frameworks for selective detection and extraction of uranium.
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-23 , DOI: 10.1038/s41467-020-14289-x
Wei-Rong Cui 1 , Cheng-Rong Zhang 1 , Wei Jiang 1 , Fang-Fang Li 1 , Ru-Ping Liang 1 , Juewen Liu 2 , Jian-Ding Qiu 1
Affiliation  

Uranium is a key element in the nuclear industry, but its unintended leakage has caused health and environmental concerns. Here we report a sp2 carbon-conjugated fluorescent covalent organic framework (COF) named TFPT-BTAN-AO with excellent chemical, thermal and radiation stability is synthesized by integrating triazine-based building blocks with amidoxime-substituted linkers. TFPT-BTAN-AO shows an exceptional UO22+ adsorption capacity of 427 mg g-1 attributable to the abundant selective uranium-binding groups on the highly accessible pore walls of open 1D channels. In addition, it has an ultra-fast response time (2 s) and an ultra-low detection limit of 6.7 nM UO22+ suitable for on-site and real-time monitoring of UO22+, allowing not only extraction but also monitoring the quality of the extracted water. This study demonstrates great potential of fluorescent COFs for radionuclide detection and extraction. By rational designing target ligands, this strategy can be extended to the detection and extraction of other contaminants.

中文翻译:


可再生且稳定的 sp2 碳共价有机框架,用于选择性检测和提取铀。



铀是核工业的关键元素,但其意外泄漏引起了健康和环境问题。在这里,我们报道了一种名为 TFPT-BTAN-AO 的 sp2 碳共轭荧光共价有机骨架(COF),通过将三嗪基结构单元与偕胺肟取代的连接体相结合,合成了具有优异化学、热和辐射稳定性的 sp2 碳共轭荧光共价有机骨架(COF)。 TFPT-BTAN-AO 显示出 427 mg g-1 的出色 UO22+ 吸附能力,这归因于开放一维通道的高度可及的孔壁上丰富的选择性铀结合基团。此外,它还具有超快的响应时间(2秒)和6.7 nM UO22+的超低检测限,适合UO22+的现场实时监测,不仅可以提取,还可以监测UO22+的质量。提取的水。这项研究证明了荧光 COF 在放射性核素检测和提取方面的巨大潜力。通过合理设计目标配体,该策略可以扩展到其他污染物的检测和提取。
更新日期:2020-01-23
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